CLDC-4203: Remove builtype from BU

app/helpers/bulk_upload/lettings_log_to_csv.rb

@@ -126,7 +126,6 @@ class BulkUpload::LettingsLogToCsv
       ((log.postcode_full || "").split(" ") || [""]).last,
       log.la,
       log.unittype_gn,
-      log.builtype,
       log.wchair,
       log.beds,
       log.voiddate&.day, # 30

app/services/bulk_upload/lettings/year2026/csv_parser.rb

@@ -4,7 +4,7 @@ class BulkUpload::Lettings::Year2026::CsvParser
   include CollectionTimeHelper
 
   # TODO: CLDC-4162: Update when 2026 format is known
-  FIELDS = 148
+  FIELDS = 147
   FORM_YEAR = 2026
 
   attr_reader :path

spec/services/bulk_upload/lettings/year2026/csv_parser_spec.rb

@@ -244,10 +244,10 @@ RSpec.describe BulkUpload::Lettings::Year2026::CsvParser do
       end
 
       it "returns correct column" do
-        expect(service.column_for_field("field_5")).to eql("AA")
+        expect(service.column_for_field("field_5")).to eql("T")
-        expect(service.column_for_field("field_22")).to eql("BK")
+        expect(service.column_for_field("field_22")).to eql("BG")
-        expect(service.column_for_field("field_26")).to eql("BZ")
+        expect(service.column_for_field("field_26")).to eql("BX")
-        expect(service.column_for_field("field_25")).to eql("S")
+        expect(service.column_for_field("field_25")).to eql("F")
       end
     end
   end